초록 ▼

A high temperature humidity determining device which measures the moisture content of gas streams with temperatures as high as, but not limited to 600°F. The device uses a solid state, thin film polymer type relative humidity/temperature sensor and electronic barometer to measure the properties of t

A high temperature humidity determining device which measures the moisture content of gas streams with temperatures as high as, but not limited to 600°F. The device uses a solid state, thin film polymer type relative humidity/temperature sensor and electronic barometer to measure the properties of the gas stream. The unit does not require laboratory quality oxygen, ice water, distilled water or any other cleaning fluids. In order to avoid damage to the sensor, a sample is cooled to below about 300°F. prior to sampling. This is done by pumping the sample air through a thermostatically controlled sample conduit, and into a positively pressurized and thermostatically controlled sample chamber. A microprocessor calculates the humidity ratio and dew point of the sample or other moist air properties, and delivers data to a visual process indicator, as well as to any other desired output.

대표청구항 ▼

A high temperature humidity determining device comprising: an insulated sample chamber; means for inducing a heated air sample from a region whose humidity is to be measured to flow into said insulated sample chamber, said inducing means including a sample conduit connected to said region and having

A high temperature humidity determining device comprising: an insulated sample chamber; means for inducing a heated air sample from a region whose humidity is to be measured to flow into said insulated sample chamber, said inducing means including a sample conduit connected to said region and having at least a cool down portion, whereby the heated air sample is cooled before reaching said insulated sample chamber; heating means for controlling the temperature of said heated air sample such that said heated air sample always remains above the dew point thereof in said insulated sample chamber and said inducing means; sensing means for sensing at least the temperature and relative humidity of the air sample in said insulated sample chamber; and means for determining a humidity parameter of the air sample based upon at least the sensed temperature and relative humidity.